/Engine/Source/Runtime/Media/Public/IMediaSamples.h
FetchVideo
virtual bool FetchAudio ( [TRange](API\Runtime\Core\Math\TRange)< [FTimespan](API\Runtime\Core\Misc\FTimespan) > TimeRange, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMediaAudioSample](API\Runtime\Media\IMediaAudioSample), ESPMode::ThreadSafe > & OutSample )